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Monthly Archives: July 2011
Bash tricks: drop the first line of a file
I work with a bunch of data that often comes in text files. I regularly want to cut off the header / first line, but I thought that to use tail you had to know how many lines are in … Continue reading
Posted in bash, Data Munging
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Amazon price jumps
Does anyone else regularly see large price swings on Amazon? I’m in the habit of adding books to my shopping cart until I run out of things to read at home, then buying whatever is in my cart at the … Continue reading
Posted in Uncategorized
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Saving output of a command and echoing to the screen
When using bash, it’s really nice to both save the output of a command to a file and print it on the screen. I couldn’t find something that did this so I wrote my own ruby script. A utility that … Continue reading
Posted in bash, Data Munging
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Online display advertising ecosystem
The biggest divide in the online advertising world is search advertising vs display advertising, and search sounds exactly like what it is — search is generally the ads next to searches on Google, Yahoo, Bing, etc. Search is bigger than … Continue reading
Unique is broken in R
Are you kidding me? $ R > unique(1,1,2,3,4) [1] 1 This was the source of yesterday’s nasty to track down bug. What you really want is unique on a vector, as in: > unique(c(1,1,2,3,4)) [1] 1 2 3 4 I … Continue reading
Posted in Programming, Programming Languages Suck, R, R Tip, Suck
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